发明名称 |
Slew rate control and optimization of power consumption in a power stage |
摘要 |
Power consumption by the driving circuitry of an output stage, employing a slew-rate controlling operational amplifier, is reduced by modulating the level of the current output by the operational amplifier in function of the working conditions of the output stage. Switching delay may also be effectively reduced. An auxiliary current generator forces an additional current through the conducting one of the pair of input transistors of the operational amplifier only during initial and final phases of a transition, essentially when the slew rate control loop ceases to be effective. The boosting of the bias current through the conducting input transistor is determined by the degree of unbalance of the differential input stage of the operational amplifier, without the use of dissipative sensing elements.
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申请公布号 |
US5656969(A) |
申请公布日期 |
1997.08.12 |
申请号 |
US19950449855 |
申请日期 |
1995.05.24 |
申请人 |
SGS-THOMSON MICROELECTRONICS S.R.L.;CONSORZIO PER LA RICERCA SULLA MICROELETTRONICA NEL MEZZOGIORNO |
发明人 |
PULVIRENTI, FRANCESCO;BONTEMPO, GREGORIO;GARIBOLDI, ROBERTO |
分类号 |
H03K17/567;H03G1/00;H03K17/00;H03K17/042;H03K17/16;H03K17/687;(IPC1-7):H03K17/687 |
主分类号 |
H03K17/567 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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